Edge-trimming cutter



(No Model.)

J. F. FREEMAN. EDGE TRMMNG CUTTER.

No. 443,434. P41-,6114441364 2s, 1890.

Janv/esl freeman/z@ UNITED STATES l PATENT OFFICE;

JAMES F. FREEMAN, OF LAWRENCE, ASSIGNOR TO JAMES XV. BROOKS, TRUSTEE, OF CAMBRIDGE, MASSACHUSETTS.

EDGE-TRINIIVIING CUTTER.

SPECIFICATION forming part of Letters Patent No. 443,434, dated December 23, 1890.

Application filed July l5, l 8 8 9.

To all whom t may concern:

Be it known that I, JAMES F. FREEMAN, of Lawrence, county of Essex, State of Massachusetts, have invented an Improvement in Edge-Trimming Cutters, of which the following description, in connection with the accompanying drawings, is a specication, like letters on the drawings representing like parts.

This invention is au improvement upon that represented in United States Patent N o. 402,375, dated April 30, 1889. The patent referred to contains a series of circular cutters connected by screws to a disk secured to a rotating shaft, the said cutters having each a single cutting-edge.

In the invention at present under consideration the disk-like cutters are secured to studs provided at their inner ends with gearteeth, each stud having bearing in a studplate fixed to the cutter-shaft, and also,pret` erably, having an additional bearing in a loose bearing-ring. The gear-teeth of the said studs engage a pinion secured to a chambered guard loose on the cutter-shaft, so that as the plate carrying the said studs is rotated in unison with the cutter-shaft the said gear-teeth, being in engagement with the said pinion there at rest with the said guard,gives to the cutters a planetary motion.

My invention consists, essentially, in an edge-trimming cutter' containing a series of rot-ary cutters and means to impart to them a planetary motion, substantially as will be described.

Figure l of t-he drawings is a section taken through part of the cutter-shaft and cutter thereon in the line y, Fig. 2. Fig. 2 is a lefthand end view of the cutter shown in Fig. l. Fig. 3 is a view with the face-plate removed, the cutter-shaft being in section in the line 5c. Fig. 4i is a section in the line no', looking toward the right. Fig. 5 is a detail showing one of the cutters, and Fig. 6 shows the bearing-ring detached.

The cutter-shaft chas a shoulder c', against which bears the inner end of the hub of a chambered guard or cup b, mounted loosely upon a reduced part of the said cutter-shaft. The hub of this guard at its end nearest the Serial No. 317,527. (No model.)

outer end of the cutter-shaft has attached to it a gear b.

The guard or cup l) receives within it loosely at its face a stud-plate c, (see Figs. 1 and 3,) having a hub 0X, fitted to a reduced part d2 of the cutter-shaft, the said plate coming against the shoulder 2, Where a key or projection l0 enters a notch in the said plate to key it to the shaft ci, and this cup-like guard also receives within it loosely a smaller bearing-ring c', (see Figs. l and (5,) provided with holes 12, the said stud-plate c and ring c being held together by a series of screws c2, herein shown as three in number, the said screws between the said stud-plate and ring passing through washers c3, so that when the screws are turned in to hold the said plate and ring together they will not act upon and bind the gears d, connected with or forming part of the studs d, to which by set-screws d2 are fixed the cutters e, shown as having each two cutting lips or edges, but which may have but one cutting-lip, as in the said patent.

The studs d at opposite sides of the gearteeth CZ are cylindrical and take bearing in holes in the said stud-plate and bearing-ring, respectively. The cutter shaft 'has also mounted upon its reduced end a rand-guide or face-plate f, having a lip of usual shape to entera rand-crease, said plate having apertures therein to receive the set-screws, whereby` access may be had to the studs of the cutters without removing the plate.

The rotation of the shaft d and the attached rand-guide and stud-plate while the rguard 7J and gear b stand still causes the cutters e to be carried in a circular path about the center of the stationary gear b, the speed of rotation being that of the cutter-shaft, and at the same time the gear-teeth d of the studs d', carrying the said cutters7 by reason of their engagement with the gear b', will cause the studs and cutters to be rotated inc and ring c', or, in other words, the cutters e will have a planetary movement, thus permitting them to cut the leather very rapidly, the double cutting-edges 5 6 yet further increasing the rapidity of the cutting operadependently about their own axes in the plate 9 IOO tion. movement it is possible to provide eaeh eutter with more than one cutting lip or edge and enable the cutter to do a greater amount of work.

l. A rotary edge-trimming eutter containing a series of rotary cutters and means to impartto them a planetary motion, combined with a face-plate j", having a lip to enter a rand-crease and apertures to receive the studs upon which Said cutters are mounted, substantially as described.

2. In an edge-tri1n1nng cutter' for leatherwork, the rotating shaft, the ehanlbered disk loose thereon and provided with a gear b', the rand-guide, the studplate, and the geared studs therein in engagement with the said By giving the eutters a planetaryi JAMES F. FREEMAN.

W itnesses:

CALEB SAUNDERH, NEWTON l. Fnvn. 

